Stabilizing crosslinked polymer guars and modified guar...

Details Stabilizing crosslinked polymer guars and modified guar... Stabilizing crosslinked polymer guars and modified guar...

2007-03-27

2007-03-27

Tsay, Frank (Department: 3672)

Wells

Processes

Graveling or filter forming

C507S273000

Reexamination Certificate

active

10911898

ABSTRACT:
An aqueous, viscoelastic treating fluid gelled with a crosslinked guar or guar derivative is stabilized and improved with an effective amount of a glycol, such as ethylene glycol. These fluids are more stable in that viscosity is maintained, particularly at elevated temperatures. The additives may also increase viscosity to the point where less of a crosslinked guar or guar derivative gelling agent is required to maintain a given viscosity. These stabilized, enhanced, aqueous, viscoelastic fluids may be used as treatment fluids for subterranean hydrocarbon formations, such as in hydraulic fracturing.

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PCT International Search Report for International Application No. PCT/US2005/027662, Jan. 30, 2006.

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